alex yates said:Something I'm not looking forward to. As far as I'm aware, the original is still on at 120k. Car doesn't use oil and crank case vac seems right so I just hope it has plenty of life left in it.
Same here, no outward issues but I thought whilst the box is off and access "good" I'll just whip it off. Type 911 does the OE makers AOS for £40 so I thought why not.
My AOS had oil gunk in every port (except coolant ports), so was probably dying. Apparently oil gunk sits on the rubber diaphragm and rots it. Anywhere oil contacts rubber on engines it hardens and dies.
It might well come off / go back on a low mileage car really easy, but like I say I think O rings had hardened making it extra hard to get vac lines off / on. Fairly easy to change the o rings though I guess. You could even just by new vac lines about £50 each).
I perhaps should have dropped the engine a little further, but it as far as I dare.
Much easier with the engine dropped, then you can do all kinds of other little jobs. Sometimes (as with Marky911) the AOS mounting bolts seized up and round off too.... mine were OK.